Supplementary Provisions, Article 17Transitional Measures Concerning Liability for Non-Performance, etc.
第十七条（債務不履行の責任等に関する経過措置）
With regard to liability for non-performance, etc. of an obligation in the case where the obligation arose before the Effective Date (including the case where the obligation arose on or after the Effective Date and the juridical act that is its cause was performed before the Effective Date; the same applies in Article 25, paragraph (1) of the Supplementary Provisions), notwithstanding the provisions of Article 412, paragraph (2), Articles 412-2 through 413-2, Article 415, Article 416, paragraph (2), Article 418, and Article 422-2 of the New Act, the provisions then in force continue to govern.
施行日前に債務が生じた場合（施行日以後に債務が生じた場合であって、その原因である法律行為が施行日前にされたときを含む。附則第二十五条第一項において同じ。）におけるその債務不履行の責任等については、新法第四百十二条第二項、第四百十二条の二から第四百十三条の二まで、第四百十五条、第四百十六条第二項、第四百十八条及び第四百二十二条の二の規定にかかわらず、なお従前の例による。
The provisions of Article 417-2 of the New Act (including as applied mutatis mutandis pursuant to Article 722, paragraph (1) of the New Act) do not apply to a claim for damages for benefits to be obtained or expenses to be borne in the future that arose before the Effective Date.
新法第四百十七条の二（新法第七百二十二条第一項において準用する場合を含む。）の規定は、施行日前に生じた将来において取得すべき利益又は負担すべき費用についての損害賠償請求権については、適用しない。
With regard to the statutory interest rate relating to a claim that is to bear delay damages in the case where the obligor assumed responsibility for delay before the Effective Date, notwithstanding the provisions of Article 419, paragraph (1) of the New Act, the provisions then in force continue to govern.
施行日前に債務者が遅滞の責任を負った場合における遅延損害金を生ずべき債権に係る法定利率については、新法第四百十九条第一項の規定にかかわらず、なお従前の例による。
With regard to an agreement on liquidated damages prescribed in Article 420, paragraph (1) of the Former Act and an agreement to appropriate anything other than money as compensation for damage prescribed in Article 421 of the Former Act, made before the Effective Date, the provisions then in force continue to govern.
施行日前にされた旧法第四百二十条第一項に規定する損害賠償の額の予定に係る合意及び旧法第四百二十一条に規定する金銭でないものを損害の賠償に充てるべき旨の予定に係る合意については、なお従前の例による。